1 files changed, 0 insertions, 58 deletions
diff --git a/db/post_migrate/20210708130419_reschedule_merge_request_diff_users_background_migration.rb b/db/post_migrate/20210708130419_reschedule_merge_request_diff_users_background_migration.rb
deleted file mode 100644
index 53f13ca96d2..00000000000
--- a/db/post_migrate/20210708130419_reschedule_merge_request_diff_users_background_migration.rb
+++ /dev/null
@@ -1,58 +0,0 @@
-# frozen_string_literal: true
-
-class RescheduleMergeRequestDiffUsersBackgroundMigration < ActiveRecord::Migration[6.1]
-  include Gitlab::Database::MigrationHelpers
-
-  disable_ddl_transaction!
-
-  # The number of rows to process in a single migration job.
-  #
-  # The minimum interval for background migrations is two minutes. On staging we
-  # observed we can process roughly 20 000 rows in a minute. Based on the total
-  # number of rows on staging, this translates to a total processing time of
-  # roughly 14 days.
-  #
-  # By using a batch size of 40 000, we maintain a rate of roughly 20 000 rows
-  # per minute, hopefully keeping the total migration time under two weeks;
-  # instead of four weeks.
-  BATCH_SIZE = 40_000
-
-  MIGRATION_NAME = 'MigrateMergeRequestDiffCommitUsers'
-
-  class MergeRequestDiff < ActiveRecord::Base
-    self.table_name = 'merge_request_diffs'
-  end
-
-  def up
-    start = MergeRequestDiff.minimum(:id).to_i
-    max = MergeRequestDiff.maximum(:id).to_i
-    delay = BackgroundMigrationWorker.minimum_interval
-
-    Gitlab::Database::BackgroundMigrationJob
-      .where(class_name: MIGRATION_NAME)
-      .delete_all
-
-    # The table merge_request_diff_commits contains _a lot_ of rows (roughly 400
-    # 000 000 on staging). Iterating a table that large to determine job ranges
-    # would take a while.
-    #
-    # To avoid that overhead, we simply schedule fixed ranges according to the
-    # minimum and maximum IDs. The background migration in turn only processes
-    # rows that actually exist.
-    while start < max
-      stop = start + BATCH_SIZE
-
-      migrate_in(delay, MIGRATION_NAME, [start, stop])
-
-      Gitlab::Database::BackgroundMigrationJob
-        .create!(class_name: MIGRATION_NAME, arguments: [start, stop])
-
-      delay += BackgroundMigrationWorker.minimum_interval
-      start += BATCH_SIZE
-    end
-  end
-
-  def down
-    # no-op
-  end
-end